That's tough. I've heard a car is worth what someone wants to pay for it. Williams Group Auto in Abilene, TX has a 1967 Chevy Nova SS for sale at $17,995. It looks in great condition, not sure if there has been any restoration work done to it. The pictures show beautiful gray interior. Y'all should check it out if interested at
www.williamsgroupauto.com.
Cheers!